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[PATCH] splice: redo page lookup if add_to_page_cache() returns -EEXIST

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This can happen quite easily, if several processes are trying to splice
the same file at the same time. It's not a failure, it just means someone
raced with us in allocating this file page. So just dump the allocated
page and relookup the original.

Signed-off-by: Jens Axboe <axboe@suse.de>
This commit is contained in:
Jens Axboe 2006-05-03 10:58:22 +02:00 committed by Jens Axboe
parent 76ad4d1110
commit a0548871ed
1 changed files with 2 additions and 0 deletions
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2
fs/splice.c
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@ -324,6 +324,8 @@ __generic_file_splice_read(struct file *in, loff_t *ppos,
mapping_gfp_mask(mapping)); mapping_gfp_mask(mapping));
if (unlikely(error)) { if (unlikely(error)) {
page_cache_release(page); page_cache_release(page);
if (error == -EEXIST)
continue;
break; break;
} }
/* /*